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$Id: isdntelctl.8,v 1.8 2003/04/06 18:20:14 wiz Exp $
$FreeBSD$
last edit-date: [Mon Dec 13 23:06:45 1999]
.Dd April 21, 1999 .Dt ISDNTELCTL 8 .Os .Sh NAME .Nm isdntelctl .Nd control isdn4bsd telephone sound format conversion .Sh SYNOPSIS .Nm .Op Fl c .Op Fl g .Op Fl u Ar unit .Op Fl A .Op Fl U .Op Fl N .Sh DESCRIPTION .Nm is part of the isdn4bsd package and is used to configure the sound format conversion facilities of the /dev/isdntel interfaces.
p The following options are available: l -tag -width Ds t Fl c Clear the telephone input queue. t Fl g Get the sound format currently in use. t Fl u Set the
a /dev/isdntel unit number. The default value is zero to access device
a /dev/isdntel0 . t Fl A Do A-law (ISDN line) -\*[Gt] mu-law (userland) conversion. t Fl U Do mu-law (ISDN line) -\*[Gt] A-law (userland) conversion. t Fl N Set sound conversion to do no format conversion. .El
p The telephony data stream comes out of the line in a bit-reversed format, so the .Xr isdntel 4 driver does the bit-reversion process in any case.
p Additionally, the user can specify to do A-law to mu-law, mu-law to A-law or no conversion at all in the isdntel driver by using the .Nm utility. .Sh FILES
a /dev/isdntel\*[Lt]n\*[Gt] .Sh EXAMPLES The command d -literal -offset indent isdntelctl -g .Ed
p displays the currently used sound format for device
a /dev/isdntel0 . .Sh SEE ALSO .Xr isdntel 4 , .Xr isdnd.rc 5 , .Xr isdnd 8 .Sh STANDARDS A-law and mu-law are specified in ITU Recommendation G.711. .Sh AUTHORS The .Nm utility and this man page were written by .An Hellmuth Michaelis Aq hm@kts.org .